Today's most popular drinks are fizzy drinks which all contain a form of acid.The acid which is in fizzy drinks is harmful to the body if consumed too much and to often

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Determination of the total acid concentration in a fizzy drink

Introduction

Today's most popular drinks are fizzy drinks which all contain a form of acid.

The acid which is in fizzy drinks is harmful to the body if consumed too much and to often. It can cause decay of the teeth .The commonest sufferers from tooth erosion are teenagers whose main drink is "pop" (Coca Cola, lemonade or other similar fizzy drinks). All the fizzy drinks have a high acidity and rapidly dissolve enamel. The more frequent the consumption the more damage is done.

The type of acid in fizzy drinks is a very weak acid with a pH of about 4-6.

Not every fizzy drink has the same concentration of acid in it. It all depends on the amount of H+ ion in the type of fizzy drinks.
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To find out the acid concentration in fizzy drinks a titration is used.

Aim

* To calculate the concentration in mol/L of hydrogen ions in 3 different kinds of fizzy drinks.

* To find out which fizzy drink is more acidic.

Method

Glassware Chemicals

2 x 200 ml beaker 0.5M NaOH

Pipette phenolphthalein

Burette sprite

Clamp stand lemonade

7 up

> Set the burette up in the clamp stand and fill it up with sodium hydroxide (NaOH).

> Using a pipette, pipette out 50ml of ...

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